294 results about "Area measurement" patented technology

A wall area estimation system generates an estimated wall area measurement of a building based on the received roof measurements (e.g., those generated by, received from or found in a three dimensional model of the roof) and a reference distance. The reference distance is a measurement indicative of a distance between a reference point on the roof and a ground surface. This reference distance may be used to determine how for down to extend the walls of the building (e.g., to a ground level) when building a three dimensional digital model of the building to aid in generating wall area measurements. The resulting wall measurements, roof measurements, measurements of areas missing from the wall used to generate a wall estimate report, or a combined roof and wall estimate report including various different identifiers indicating the different features and measurements based on the three dimensional model.

A system generates an estimated floor area measurement of a building based on the calculated estimated total roof area of the roof of the building. This is based on a correlation between the size of the building roof and the size of the building. Typically, the floor area of a single full floor of the building is roughly the size of the roof of the building if the roof were flat with no slope. This in effect is turning the roof into a floor to generate estimated floor area. With additional adjustments to area measurements to account for multiple floors, roof overhang, wall width, internal building features such as walls and staircases, and / or obstructed views of the building in the aerial image(s), etc., an even more accurate floor area estimation may be generated.

A wall area estimation system generates an estimated wall area measurement report of a building. Included in the wall area measurement estimate report are multiple line drawings of a building having a roof. Two of the multiple line drawings are perspective views from an angle of view above the building. A first of the perspective views is substantially centered on a first substantially vertical exterior corner of the house that is approximately opposite of a second substantially vertical exterior corner of the house on which a second of the perspective views is substantially centered. The first and second of the perspective views include a line drawing of the roof that is transparent or translucent to show interior surfaces of the walls of the building in the first and second of the perspective views. The walls of the interior surfaces shown are shaded darker than the walls of the exterior.

The apparatus and method for the detection and quantification of joint and tissue inflammation (100) of the present invention comprises a sensing component (102) for obtaining and collecting data indicative of the surface or dimensions of the joint or tissue. The sensing component (102) comprises various components for obtaining measurements of the cardinal signs of inflammation. Preferably the sensing component (102) includes a device for detecting swelling (104), a color analyzing device (108), a temperature measuring device (110), a pain or tenderness detection device (112), an archival and retrieval device (114), and a display device (116). In operation a patient is placed in position for examination of the joint or tissue area measurements are taken of one or more of the cardinal signs of inflammation at the joint or tissue area, the measurements are automatically stored in a archival storage and retrieval device (114), and from the measurements an inflammation score is derived which can be compared against a baseline.

A wind turbine includes a plurality of wind turbine blades attached to a rotor positioned atop a tower affixed to a tower foundation. At least one blade pitch sensor is configured to measure blade pitch angles for one or more of the wind turbine blades. A rotor / generator speed sensor is configured to measure the rotational speed of the wind turbine rotor, a corresponding wind turbine generator, or both. A wind turbine nacelle yaw sensor is configured to measure the nacelle yaw, while at least two tower-base bending sensors are configured without use of adhesives, cements or bonding agents to provide large-area measurement of tower deflection. A controller is configured to adjust the pitch angle of one or more of the wind turbine blades in response to the measured one or more blade pitch angles, the measured rotational speed, the measured nacelle yaw and measured tower longitudinal deflection.

A system generates an estimated floor area measurement of a building based on the calculated estimated total roof area of the roof of the building. This is based on a correlation between the size of the building roof and the size of the building. Typically, the floor area of a single full floor of the building is roughly the size of the roof of the building if the roof were flat with no slope (i.e., virtually turning the roof into another floor to generate estimated floor area). With additional adjustments to area measurements to account for multiple floors, roof overhang, wall width, internal building features such as walls and staircases, and / or obstructed views of the building in the aerial image(s), etc., an even more accurate floor area estimation may be generated.

A wind turbine includes a plurality of wind turbine blades attached to a rotor positioned atop a tower affixed to a tower foundation. At least one blade pitch sensor is configured to measure blade pitch angles for one or more of the wind turbine blades. A rotor / generator speed sensor is configured to measure the rotational speed of the wind turbine rotor, a corresponding wind turbine generator, or both. A wind turbine nacelle yaw sensor is configured to measure the nacelle yaw, while at least two tower-base bending sensors are configured without use of adhesives, cements or bonding agents to provide large-area measurement of tower deflection. A controller is configured to adjust the pitch angle of one or more of the wind turbine blades in response to the measured one or more blade pitch angles, the measured rotational speed, the measured nacelle yaw and measured tower longitudinal deflection.

The invention discloses a height and area measurement method based on a monocular camera three-dimensional distance measurement model. The height and area measurement method comprises the following steps: obtaining the focal length of a camera through monocular camera calibration, wherein the unit of the obtained focal length is the number of pixel points on a unit distance and is in proportion to the imaging size of a CCD plate; modeling the monocular camera three-dimensional distance measurement model and calculating the distance between an object and the camera according to the modeled model; further realizing height and area measurement of the object according to the calculated distance through the model. The height and area measurement method based on the monocular camera three-dimensional distance measurement model requires less priori knowledge and does not need the troublesome process of requiring feature point matching of binocular distance measurement. On the other hand, the height and area measurement method is excellent in instantaneity, and when the 3-mega-pixel camera is adopted and the distance measurement range is within 50 m, the error rate is basically controlled within 5%. After accurately acquiring the angle of depression and focal length of the camera as well as other priori knowledge, the height and area measurement method can be completely applicable to the application fields of highway front obstacle detection and basic identification.

The invention provides a measuring wheel used for measuring distance and area and a measuring method thereof, belonging to the technical field of measuring wheel. The invention solves the problem that the traditional measuring wheel can not directly measure area. The measuring wheel used for measuring distance and area comprises a measuring wheel, a wheel frame arranged on the measuring wheel and a handle connected onto the wheel frame, an operational display interface is arranged on the handle, a sensor used for detecting number of turns of rotation of the measuring wheel, the handle is also internally provided with a central processor, the sensor and the operational display interface are all connected with the central processor, the handle is also internally provided with a storage and a geomagnetic field sensor which are connected with the central processor, the central processor is used for receiving a turn number signal and an angle signal, and area surrounded by the way that the measuring wheel rolls for a circle around the ground is calculated according to circumference of the measuring wheel, number of turns of the measuring wheel and steering angle of the measuring wheel, and a result is delivered to the operational display interface to be displayed. The measuring wheel provided by the invention can measure distance and also can directly, rapidly and accurately realize area measurement.

The invention provides a method for measuring large-area soil humidity, which comprises the following step of: mounting a vertical polarized receiving antenna, a GPS (Global Positioning System) receiver and a computer for carrying out signal processing. The measuring process is carried out by utilizing the interference effect of a GPS signal and a reflecting signal thereof. By utilizing the widely existing GPS signal as a signal source, the method can be used for carrying out all-weather large-area measurement, has low cost and more further simplifies a receiving device by utilizing the interference effect.

The invention relates to an area measurement technology of the broad leaved plant vane, particularly to a method using the digital camera to combine the squared paper, the Photograph software measurement and the computation of the broad leaved plant vane. The method includes the steps of collecting the plant vane, soaking with water, extracting the vane when in the measurement, blotting by filter paper, laying on the transparent plastic plate arranged in the row. The plastic plate is put on the fixed standard squared paper, shot by the digital camera, computing the pixel of the vane by the Photoshop software, dividing the pixel value with the area of 1 cm2 of the standard squared paper. A plurality of samples are measured to obtain the mean, namely the vane area of the plant. The method is simple, correct, low in cost, strong in the field maneuverability, especially used for measuring the dehydration broad leaved plant vane, which is a practical method for the scientific research.

A burden on a user is reduced by referring to a measurement region set for a certain measurement tool among a plurality of measurement tools to be used by an appearance inspection device as a measurement region of another measurement tool. A reference point or a search region serving as a reference of measurement for a first measurement tool such as a connector dimension inspection tool is set for a basic image acquired by imaging a non-defective product. Next, a second measurement tool such as an area measurement tool that performs measurement separate from the first measurement tool is selected by the user. For coordinate data of a measurement region, which is a region to be measured by the second measurement tool, coordinate data of the reference point or the search region set for the first measurement tool is adjusted if necessary and referred to.

An initial light control value calculation section calculates the backlight's initial light control value K0 according to brightness of an inputted image signal for each area. A black area measurement section measures a black area S by obtaining ratio of the number of pixels satisfying Y≦Y0 (Y: brightness signal level, Y0: black level threshold) in the screen. A minimum light control value output section determines a minimum light control value Kmin based on comparison between the measured black area S and a black area threshold S0 and outputs a maximum value permissible for the light control value as the value Kmin when the black area S is the threshold value S0 or less. An LED control signal calculation section outputs a control signal to LED light sources based on a light control value K1 as the higher one of K0 and Kmin.

The invention discloses a plant leaf area lossless measuring method. According to the plant leaf area lossless measuring method, a leaf blade image collection method and an indoor leaf area measurement calculation method are mainly used for carrying out measurement and calculation; according to the leaf blade image collection method, a digital camera, a shooting background base plate, coordinate paper, a steel tape and other tools are used as tools, and are easy to operate and convenient to carry, especially when shooting is carried out on the situation that the shooting resolution and the image storage pixel level set when the digital camera leaves the factory are utilized, and the shooting angle is close to 90 degrees, a clear leaf blade image can be obtained, and leaf area measuring accuracy does not have significant difference; according to the indoor leaf area measurement calculation method, the shot leaf blade image is stored in a computer preloaded with AutoCAD software, and the leaf area of a plant is measured and calculated by running the AutoCAD software. Lossless measurement of the leaf area can be achieved by combining the digital camera and the AutoCAD software; compared with a popular leaf area determinator at present, the plant leaf area lossless measuring method has the advantages of being easy and convenient to operate and low in cost.

The invention provides a method for performing electric line patrolling based on an onboard laser radar. The method comprises the following steps: (1) acquiring real point cloud data through an onboard laser radar system of an unmanned aerial vehicle, providing data basis for monitoring personnel of a power transmission line, and processing the point cloud data; step (2) performing distance measurement and area measurement on any point of the line based on a three-dimensional measurement analysis module, thereby directly and precisely measuring the coordinate and elevation of each point of thepower transmission line, space distance between any two points, and any point elevation; step (3) dividing point cloud data into ground surface point cloud, power transmission body point cloud and ground object point cloud in corridor based on filter processing and point cloud classification on the laser point cloud by a filter and ground object classification module. The method provided by the invention has the advantage of quickly acquiring high-precision laser point cloud and high-resolution digital image, whether the route selection design of a newly established line, or the dangerous point line patrolling checking, line capital management and various specialty analysis potentials on the established line.

The invention discloses an improved Zernike moment edge detection method, which relates to an image processing method. The invention provides an improved Zernike moment edge detection method, which aims to the sub-pixel positioning of pixel points near an intersection point. The method comprises the following steps: carrying out sub-pixel edge extraction on an industrial CT (computed tomography) image by using a Zernike moment method, and refining an edge; then, obtaining the distribution of an edge direction parameter phi by using a 8-chain code tracing method, and calculating a difference value delta phi of the edge direction parameter phi; selecting a threshold T; judging whether an edge point is the pixel point near the intersection point; if the edge point is not the pixel point near the intersection point, carrying out least square fit on the edge point so as to obtain a linear equation; and calculating the sub-pixel coordinates of a to-be-corrected edge point near the intersection point by using the linear equation. The improved Zernike moment edge detection method well makes up for a shortage that the positioning error of a pixel point near an intersection point in a Ghosal algorithm is large, and has an important significance for high-precision area measurement and high-precision three-dimensional measurement.

The invention provides an aircraft spraying state monitoring device and an aircraft spraying operation area measurement system. The aircraft spraying state monitoring device comprises a spraying state monitoring unit, a global satellite navigation system GNSS, a height measuring unit, an airborne supervisory control unit and an airborne display unit. The airborne display unit is connected with the spraying state monitoring unit, the global satellite navigation system GNSS, the height measuring unit and the airborne supervisory control unit, and is used for displaying spraying state monitoring data collected by the spraying state monitoring unit, the position, velocity, course and flight height data of the aircraft operation, the distance data of a spray lance and the ground plant canopy, and aircraft pesticide application state data corresponding to different time nodes, wherein the position, velocity, course and flight height data of the aircraft operation are collected by the GNSS, and the distance data are collected by the height measuring unit. The aircraft spraying state monitoring device provided by the invention is capable of effectively monitoring the spraying state during aircraft operation.

The invention discloses a flattening conducting information system video prevention and control system and method. A video prevention and control unit comprises a foundation data management module, a real-time video playing module, a history video playing module, a cloud deck point location cloud mirror control module, a zone navigation module, a zone selecting module, a map searching module and a distance measurement and area measurement module. The real-time video playing module is used for achieving playing of real-time video of an appointed point location. The cloud deck point location cloud mirror control module is used for achieving cloud mirror control with a cloud deck point location. The zone navigation module is used for achieving preset on-duty service checking of patrol zones. The map searching module is used for achieving map locating on skynet point locations. The distance measurement and area measurement module is used for achieving measuring of the appointed length and the zone area. Through video collecting equipment, via video monitoring point location images, quick dispatching of police strength and crime periphery monitoring cameras is achieved, and according to a heavy task guaranteeing pre-plan, video calling is achieved quickly.

The invention relates to an effective sampling method for establishing a sampling frame and designing auxiliary variables to realize crop area measurement under the support of historical remote sensing product data, wherein CACVM (crop acreage coefficient of variance in multi-years) and Mean respectively represent the change rate and average size of the crop cultivated area for multiple years in a sampling unit; and the two indexes are respectively used as the layered marker of the first stage and second stage of a two-stage layered sampling method. The Daxing, Fangshan, Shunyi and Tongzhou counties which have the concentrated cultivated areas of winter wheat in Beijing are used as research regions to be tested, thereby evaluating the effectiveness of the method provided by the invention.

The invention provides an operation-region automatic identification and area measurement system of cross-regional operation machinery and a method. The operation-region automatic identification and area measurement system comprises an ARM9 series embedded central processing unit, a cross-regional operation area measurement module, a power module, a GPRS network communication module, a storage module, a detection module and a remote monitoring display module. The cross-regional operation area measurement module comprises a GPS positioning module, an operation region and non-operation region automatic identification module and an area measuring module, and the GPS positioning module enables positioning information to be transmitted into an ARM9 embedded processor; the ARM9 embedded processor is used for processing the positioning information and calculating the corresponding operation area and cost; the GPRS network communication module is used for transmitting measurement data to the remote monitoring display module in real time. Area and cost calculation is completed rapidly. Measurement is conducted rapidly, the situation that a payment dispute occurs between a lease broker and a farmer due to the area of farmland can be avoided, the requirements for low prices, simple operation and use convenience are met, and accurate bases are provided for operation costs of cross-regional agricultural machinery.

The invention relates to a system based on GRS for measuring working areas. The system comprises a GPS receiving module, a single chip computer, a memory, a keyboard, a display, a printer and a powersupply, wherein the GPS module receives a GPS satellite signal and inputs positioning information into the single chip computer by an RS232 serial port; the single chip computer processes the positioning information and calculates the area of the farmland; the memory stores a working record; by the keyboard and the display, the working fee-charging unit price is input, the date is set, the workingroute is trimmed, the working area is calculated, and the working record is searched; and the minitype printer prints and outputs the working record. The invention adopts a GPS positioning system tomeasure the working area of the original farmland, adopts the single chip computer to trim the working area of the original farmland and enhances the measurement accuracy of the working area of the farmland.

The invention discloses a plane area measuring method based on digital image analysis, which comprises the steps of establishing a photographing system and setting a photographing background plane; placing a measured object on the photographing background plane and enabling the measured object to be parallel to the photographing background plane; carrying out imaging by using the photographing system to acquire a measured digital image; processing the measured digital image and calculating the reference area and a reference pixel value of a reference image; calculating a target pixel value of the measured plane; calculating the target measurement area of the measured plane; calculating an area correction coefficient; and carrying out correction on the target measurement area according to the area correction coefficient so as to acquire the actual area of the measured plane. The plane area measuring method disclosed by the invention is based on digital image analysis technique, enables plane area measurement to be realized conveniently, and has the advantages of high accuracy and wide application range.

A wide area measurement system adaptive time-delay compensation method relates to a time-delay compensation method. At present, for methods adopting prediction compensation, the duration of prediction time is directly set at a fixed value according to experience, the adaptation is poor, and the prediction compensation error is large. The method provided by the invention comprises the following steps of determining the time-delay duration of prediction compensation required by each PMU substation of a wire area measurement system; selecting a corresponding measurement signal according to needs, performing prediction compensation, performing pretreatment of the measurement signal, wherein the pretreatment comprises detection and processing of abnormal data in historical data, detecting whether abnormal data occur by calculating whether the measurement signal data change rate is suddenly changed or not, and replacing the abnormal data when the abnormal data are detected; and a step of performing prediction compensation of data of the selected measurement signal. The time-delay compensation method of the technical scheme is simple and reliable, the calculation data size is small, the prediction compensation error is small, and accurate prediction compensation is achieved.

The invention relates to a GIS-based marine disaster area extraction method. The method comprises the following steps: first, performing spatial matching alignment on a plurality of overlapped orthographic remote sensing images taken by an unmanned aerial vehicle by use of an SIFT algorithm to realize image splicing and get a wide-angle remote sensing panorama image; then, establishing the pixel coordinates of the remote sensing images, realizing geometric correction based on the coordinate transformation relationship between the coordinates of the pixels of the remote sensing panorama image in an image coordinate system and the ground coordinates, and superposing the geometrically-corrected remote sensing panorama image on a GIS platform through geographic coordinate location; and finally, implementing a red tide / oil spill identification and detection technology and vector data superposition operation before and after disaster on the remote sensing panorama image to realize red tide disaster and oil spill location and query and area measurement as well as typhoon and storm surge location and query and disaster area measurement. The method provides real-time field data for marine forecasters in rapid alert, and improves the ability of marine dynamic monitoring and disaster prevention and mitigation emergency monitoring.

The invention discloses a leaf area measuring method based on lasers and images. The leaf area measuring method includes the steps that the number (n) of pixel points of a digital camera is preset; a standard board is used, wherein the length-width ratio of the standard board is the same as the length-width ratio of a screen of the digital camera, and when the shooting range of the digital camera covers the standard board, a laser range finder is used for measuring the distance between the standard board and a lens of the digital camera; when the shooting range of the digital camera is enabled to cover a leaf on a leaf clip, the laser range finder is used for measuring the distance between the leaf clip and the lens of the digital camera, and a photo is shot; according to data acquired from the above steps, the area of a shot image containing the leaf is calculated; and the area of the leaf is obtained according to the area represented by each pixel, and the number of the pixels of the leaf after image processing. According to the leaf area measuring method, based on the optical imaging principle, the laser range finder and the standard board are adopted in the leaf area measuring method, and therefore the detection accuracy and the detection speed of the area of the leaf are improved.

The invention belongs to the field of aero-engine detection, relates to measurement on the throat area of a turbine guider of an aero-engine, and discloses a device for measuring the throat area of the guider of the aero-engine. The device mainly comprises a base plate 9, a locating mandrel 12, N lever assemblies for measuring section widths, a lever for measuring section heights, 2N displacement sensors and a locating component. The device has the advantages that a locating system consistent with the six-point locating principle is adopted, and therefore the device is accurate in location during working, stable and reliable in measuring result and high in repeated accuracy; with the integrated structure of the N lever assemblies, the widths and heights of a plurality of sections of one channel can be measured at the same time through one-time location, location errors caused by measurement through a plurality of measuring tools are eliminated, and accumulation of manual measuring errors caused by repeated operation is reduced; meanwhile, the operation process is simple, and work efficiency is greatly improved.

The invention provides an agricultural machine, and a measuring device and measuring method for an operation area of an agricultural machine. The agricultural machine uses the measuring device for an operation area of an agricultural machine to collect latitude and longitude data in real time, record a movement track of the agricultural machine, remove latitude and longitude information points with offsets, determine an operation track of the agricultural machine, determines a contour line of the operation track graph of the agricultural machine as an operation area boundary line, and calculate an area of the operation area according to a plurality of measurement reference points and the boundary line of the operation area. According to the invention, the boundary line of the operation area is determined by removing offset points and filling up blank points and the area of the operation area is calculated by the plurality of measurement reference points, so that measurement becomes fast and the precision is improved.

The invention discloses a scan path programming method obtained by leaf dense point cloud on the basis of laser ranging and solves the limitation of laser measurement field depth and measurement distance and the problem that the complex curve surface measurement needs the rotation axis and the measurement accuracy difference, and the noise in the front rim area and the back rim area is big. The scan path programming method comprises steps of intercepting the section couture curve of the leave shape surface, performing segmentation and extending on the section counter curve, generating a measurement path according to the segmented curve, calculating the normal angle mean value of different measurement areas as the measurement angle for measuring the leave curve surface by the laser distance measurement sensor, obtaining the dense four sheet point cloud data, unifying the four-sheet point cloud data to the same one coordinate system to obtain the complete sheet point cloud data, and performing integral optimization on the point cloud data to obtain the final high accuracy dense point cloud data. The beneficial effects are that: the invention fully utilizes the advantages that when the laser distance measurement principle head and the object to be detected form a certain angle, the measurement accuracy is not affected, front-back rim high curvature small radius area measurement is realized, the measurement accuracy is high and the speed is fast.

The invention provides a piezoelectric sensor pre-tightening device, belongs to the field of sensors and measuring and control devices of the sensors and particularly relates to application of a piezoelectric quartz sensor in the field of three-dimensional force measurement. The piezoelectric sensor pre-tightening device consists of a stress block, an upper three-dimensional piezoelectric sensor, a lower three-dimensional piezoelectric sensor, a stud, a nut, an upper press block, a lower press block and a plurality of T-shaped groove nuts. The piezoelectric sensor pre-tightening device eliminates interference brought by pre-tightening force change by using the two sensors, avoids direct contact between an elastic pre-tightening part and the stress block, accordingly eliminates the influence on outputting, of the pre-tightening force change, when the pre-tightening part is stressed to deform, and improves consistency and accuracy of area measurement. The piezoelectric sensor pre-tightening device can perform three-dimensional force measurement, and a reliable measurement area can be further expanded through combined usage. The piezoelectric sensor pre-tightening device is simple in structure, easy to adjust, flexible and convenient to use and wide in application.